Company lists · Data verified August 2026

Top 25 Data privacy law firms based in the United States

Name: Data privacy law firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 464 companies tracked

There are 464 data privacy law firms headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 4,268 professional contacts across them, including 2,252 with verified work emails and 1,941 with mobile numbers. New York is the largest hub.

This list covers data privacy law firms headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

464Companies

4,268Contacts tracked

2,252Verified emails

1,941Mobile numbers

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The 25 largest data privacy law firms based in the United States

Ranked by team size

Top 25 of 464 data privacy law firms based in the United States, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Haystackid	Chicago, IL	201-500	369	251
2	Trustarc	Walnut Creek, CA	201-500	360	204
3	Mullen Coughlin LLC	Devon, PA	201-500	213	172
4	Wilkinson Barker Knauer, LLP	Denver, CO	51-200	137	108
5	Lightfoot, Franklin & White	Houston, TX	51-200	134	85
6	360 Advanced	St Petersburg, FL	51-200	130	84
7	Redgrave LLP	Chantilly, VA	51-200	111	81
8	Hudson Cook, LLP	Hanover, MD	51-200	78	40
9	Zwillgen	Washington, DC	51-200	72	62
10	Focal Point Data Risk A CDW Company	Tampa, FL	201-500	68	39
11	Compliancepoint	Duluth, GA	51-200	52	33
12	Bortstein Legal Group	New York, NY	11-50	46	39
13	Deer Brook Consulting	Portland, ME	51-200	39	28
14	Walsh Pizzi O'reilly Falanga LLP	Philadelphia, PA	11-50	38	35
15	Clarip	Wilmington, DE	11-50	33	17
16	Lerman Senter Pllc	Washington Dc, DC	11-50	29	25
17	Sourcepoint By Didomi	New York City, NY	51-200	29	20
18	Troutman Amin LLP	Irvine, CA	11-50	27	15
19	MAC Murray & Shuster LLP	New Albany, OH	11-50	25	16
20	Security Validation Secval Mssp	Oradell, NJ	51-200	25	10
21	Capsicum Group, LLC	Fort Lauderdale, FL	11-50	25	8
22	Hintze LAW Pllc	Seattle, WA	11-50	24	16
23	BD Emerson	Richmond, VA	51-200	24	6
24	Mcguire LAW	Chicago, IL	11-50	23	18
25	Cyxcel	Roswell, GA	51-200	23	8

Showing 25 of 464 data privacy law firms based in the United States

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Data privacy law firms based in the United States at a glance

As of Aug 28, 2026

1-10Median size (employees)

New YorkLargest hub · 32 HQs

1,941Contacts with mobile numbers

5Emails re-verified in last 30 days

Companies by employee count

1-10

341

11-50

51-200

201-500

501-1,000

Data privacy law firms by metro

Metro	Companies
Data privacy law firms in New York	32
Data privacy law firms in Washington	30
Data privacy law firms in San Francisco	19
Data privacy law firms in Atlanta	14
Data privacy law firms in Austin	13
Data privacy law firms in Denver	9
Data privacy law firms in Chicago	9

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “data privacy law firms”, with match quality audited by blind human judging, and headquartered in the United States.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Contact records re-verify on a rolling cadence; 5 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many data privacy law firms are there based in the United States?

There are 464 data privacy law firms headquartered in the United States as of August 2026 (RevenueBase).

What is the largest company on this list?

Haystackid, headquartered in Chicago, tops this list with the largest team on record.

Which city has the most data privacy law firms?

New York leads with 32 headquartered companies, followed by Washington (30) and San Francisco (19).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 2,252 verified decision-maker contacts tracked across these 464 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph, the same data that powers RevenueBase's B2B data products and the free research portal.